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Summarize this article about eating disorders.

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Input: Anorexia nervosa, bulimia, and binge eating are the three most common eating disorders. Anorexia is characterized by an obsession with losing weight and extreme caloric restriction, bulimia by recurring episodes of binge eating followed by purging, and binge eating by compulsive eating even when not physically hungry.
Output:
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Eating disorders are mental health conditions that affect the way individuals perceive their body, weight and food. The three main types of eating disorders are anorexia nervosa, bulimia, and binge eating. Individuals with anorexia have an intense fear of gaining weight and restrict caloric intake, those with bulimia engage in binge eating followed by purging, and those suffering from binge eating disorder eat large amounts of food even when not physically hungry.